地理既河流問題(英文)20點

Q1:The river flows more or less smoothly as you go downstream?
The river flows more smoothly as you go downstream.
Q2:The river gets wider or narrower as you go downstream?
The river gets wider as you go downstream.
p.s. cannot find and provide you reason

參考根據：
RIVER'S COURSE
A river has three main stages.
In the first, the river is steep and narrow and its flow is rapid and rough.
In the second stage, it is wider, less steep and flows more smoothly through flat-bottomed valleys.
In the third stage, the river is broad and flows placidly across flat coastal plains to the sea, where it drops its sediment.